How is NOx formed?
Release time:
2023-01-30
In the process of coal combustion, the amount of NOx production and emissions are closely related to the combustion mode, combustion temperature and excessive air coefficient, and the formation of NOx can be divided into thermal type, fuel type and rapid type.
In the process of coal combustion, NOx is produced, which is mainly made up of NO and NO2, and a small amount of N2O. In the process of coal combustion, the amount of NOx production and emissions are closely related to the combustion mode, combustion temperature and excessive air coefficient, and the formation of NOx can be divided into thermal type, fuel type and rapid type.
type thermal NOx, it is to point to in the air, through the high temperature condition, N2 and O2 reaction in the production of NOx, reaction temperature directly to heat the rational NOx formation plays a decisive influence, and N2 concentration and residence time, also in the process of excessive air system and smoke stay, has a huge impact on thermal model of NOx production.
NOx type fuel is coal of nitrogen in the nitrogen atoms form combined with various hydrocarbons, form chain compounds, nitrogen ring or you burning, reactions produce NO oxygen and nitrogen atoms in the air, NO was oxidized to NO2 in the atmosphere, nitrides by thermal decomposition of fuel, NO oxidation production, called the NOx of fuel type.
hydrocarbons in the fuel in the area of fuel concentration is higher, the combustion of hydrocarbon with N2 reaction, the formation of CN and continue to be oxide NOx formation, HCN compounds called type thermal NOx.
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